1989 Buick Century Cooling fan relay

1989 BUICK CENTURY

KEVIN SCHLARB

MEMBER
1 POST

Engine Cooling problem
1989 Buick Century 6 cyl Front Wheel Drive Automatic
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I have a 1989 Buick Century (3.3L). I believe i need a cooling fan relay. I have found the location of the relay but there are four of them that are exactly the same. I don't know which one is the correct one. Could you tell me which one it is. I have replaced the thermastat, fan and temp sensor, still can't get the fan to kick on.

Jul 2, 2008 at 1:22 PM

JDL

✓ASE Certified Mechanic
16,098 POSTS

If there are 5 of those relays in the pack, my info shows the middle one is for coolant fan.

Just to be sure, you can look at the wiring colors on the diagram for that relay, match-up the colors with the colors on your connector. www.autozone.com has diagrams, click on (vehicle repair guides) follow the links.

Did you try taking the electrical connector loose from the fan, use jumpers to run B+ and ground from the battery? Just to see if the fan will run? You might use an inline fuse, just incase.

Sometimes those relays in the relay pack are the same, you might be able to swap one of the others for the suspect relay, just for testing. My info shows the outside relay on the passenger side is the ac compressor clutch relay, you might be able to swap it out, if their the same, with the coolant fan relay, for testing. Again you might look at the wiring diagrams to see if the colors match up on the connector. If the ac compressor clutch will kick in, after the swap, then the relay maybe ok. I'm assuming your ac system is in working order?

Jul 3, 2008 at 12:42 PM

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